Door-controlling means.



No. v 77,374.

PATBNTED JAN. 21, 190a. J. RIOKLL noon CONTROLLING MEANS.

APPLICATION FILED MAR. 29, 1907.

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No. 877,374. PATENTED JAN. '21, 1908.

wammu J. RIQKLI. DOOR CONTROLLING MEANS.

APPLICATION FILED MAR. 29, 1907.

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JOHN RIGKLI, OF OARROLLTON, OHIO.

DOOR-CONTROLLING MEANS.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed March 29, 1907- Serial No. 365.399.

To all whom it may concern: Be it known that'I, JOHN RICKLI, a citizenof the United States of America, residing at Oarrollton, in the countyof Carroll and State of Ohio, have invented new and useful Improvementsin Door-Controlling Means, of which the following is a specification.

This invention relates to means for controlling furnace and stove doors,the main object of the invention being to provide a simple and eflicientconstruction of means for holding the check-draft door normallyclosedand automatically opening the same when a predetermined highdegree of temperature is reached, to allow the stove to cool off andobviate all liability of danger from excessive temperature.

The invention is illustrated in the accomp anying drawings, in whichFigure 1 is a perspective view of a furnace embodying my invention. Fig.2 is a vertical longitudinal section of the door-opening device. Fig. 3is a view of the fusible looking pin. Fig. 4 is a view of the pinholding and applying device.

Referring to the drawings, 1 designates a stove or furnace provided witha check-draft door 2, hinged at one side, as at 3, to swing to an openor closed position. In accordance with my invention, the door isprovided with a sliding latch b olt'4 provided with a longitudinal slot5 engaging guide members 6 on the door frame, said bolt being providedat its rear end with a finger piece 7 and having its opposite endreduced to form a latch member 8. The member 8 when projected lies, whenthe door is closed, above a keeper member 9 on the stove body, whichkeeper member is provided with a socket or opening to receive a latchpin 10, whereby the door is looked in closed position. This latch pin iscomposed of some suitable fusible material, such as lead and tin,adapted to melt at a predetermined degree of heat, say 530 degreesFahrenheit, thus releasing the door and permitting it to be opened. Acatch basin or receptacle 11 is provided below the keeper to receive themolten metal of which the pin is made, thus preventing all liability ofa conflagration being started. by the dropping of the metal on thefloor. If desired, a device for holding a lurality of the locking pinsand convenient y applying the same may be employed. Such a device isshown in Figsdl and 4 and comprises a hollow handle 12 forming areservoir for the pins, which handle is closed at its outer end by apivoted cover 13. From the opposite end of the handle project jaws 14and 15, forming a pair of tweezers by which a pin may be gripped andconveniently inserted into the keeper. The jaw 15 is preferably formedwith a notched lug 16, in which the pin 10 is adapted to be securelyheld by the pressure of the free end of the jaw 14. A chain or otherflexible connecting medium 17 is employed for connecting the device withthe body of the furnace, as shown in Fig. 1, so that it may beconveniently manipulated and its loss prevented.

The free end of the door is provided above the latch with .a pivotedholding arm 18 adapted to be swung to a horizontal position beyond theend of the door or wholly over upon the front surface of the door, andto rest in such positions upon supporting ears or projections 19 and 20.A door opening do vice is employed in connection with this arm 18 forautomatically opening the door upon the fusing of the pin 10. This dooropening device comprises an arm or bar 21 provided at its outer end withan operating handle 22 and having a hookshaped inner end forming anupturned arm 23 and a downturned parallel pintle 24, the latter beingournaled in a socket or hearing 25 on the wall of the furnace to permitsaid bar to be swung in a horizontal plane toward and from the free endof the door. A suitable form of stop device 26 is provided upon the arm23 to engage the furnace and limit the inward swinging movement of thebar. A bracket 27 is slidably 'mounted on the underside of the bar 21and provided with cuffs or sleeves 28 engaging the same, and on'one ofsaid sleeves is mounted a clamping screw 29 for holding the bracket infixed position upon the bar. The front and rear ends of the bracket aredownturned to form supporting portions 30 and 31, the portion 30 beingprovided with a transverse slot 32 to slidably receive a door openingmember 33 provided with a downturned finger 34 at its forward end toengage in the space between the wall of the furnace and arm 18, when theparts are in operative osition.

as a downturned portion 35 threaded to receive the inner threaded end ofa coiled contractile spring 36, which is secured thereto by a retainingnut 37. The outer or rear end of the spring receives and is secured to ahead 38 connected with a screw stem 39 which The rear end of the member33 passes through an opening in the portion 31 of the bracket 37 and isprovided with an adjusting and retaining nut 40.

In the operation of the device the parts are arranged, as shown in Fig.1 with the door closing device mounted in o erative position by theengagement of t e finger 34 with the arm 18, said finger lying betweensaid arm and the wall of the furnace, from which it will be understoodthat the member 33 will be held from outward movement against the pullof the spring 36 by the re sistance of the door, which is locked inclosed position by the pin 10. When the temperature within the stovebody and transmitted to the pin reaches a predetermined high oint, thepin will be fused, thus leaving the d oor free to open, when the member33 will he slid rearwardly by the action of the spring 36, thus pullingthe door open. In such action the arm 18 in swinging outwardly slidesoff the finger 34, permitting the door to open to a determined extent bythe transmitted motion and momentum. The stove or furnace is thusallowed to cool down, and when normal conditions are restored the dooropening device may be again set to operate in an obvious manner.

It will be understood that the power of the door opening device may beregulated by holding the spring expanded to a greater or less extentthrough the adjustability of the bracket 27 on the bar or arm 21, andalso through the adjustability of the head 38 through the stem 39 andnut 40. Hence the power may be regulated according to the weight of thedoor and the degree to which it is desired to throw it open. In theevent that it is not desired to employ the.

door opening device the arm 18 may be thrown inward to rest upon the pin20, and the ordinary locking pin may be employed in lieu of the pin 10.

Having thus described the invention, what is claimed as new, is

1. In combination with a stove or furnace and its check-draft door, afusible lock for holding the door closed, a supporting bar, and adoor-engaging and opening device slidably mounted-on the bar andoperative to open the door upon the fusion of the lock.

2. In combination with a stove or furnace and its check-draft door, afusible locking device for holding the door closed, an arm upon the doorprojecting beyond the free end thereof, a swinging bar, a door openingdevice slidably mounted on said bar and adapted to engage the arm, and aspring for operating said opening device.

3. In combination with a stove or furnace and its check-draft door, afusible lock for holding the door closed, a supporting bar, a bracketadjustably mounted on the bar, and a sliding door-engaging and openingdevice carried by the bracket and operative upon the fusion of the lockto throw the door open.

4. In combination with a stove or furnace and its check-draft door, afusible lock for holding the door closed, an arm upon the door, apivotally mounted bar, a sliding door opening operating device on thebar adapted to engage the arm, a spring for operating said device, andmeans for regulating the power of the spring.

5. In combination with a stove or furnace and its check-draft door, afusible lock for holding the door closed, a supporting bar, aspring-operated sliding door-engaging and opening member supported bythe bar 0 erative upon the fusion of the lock to t row the door open,and means for regulating the.

action of the spring.

6. In combination with a stove or furnace and its check-draft door, afusible lock for holding the door closed, an arm pivotally mounted uponthe door, means for su porting said arm in projected and retracteposition, a bar, and a spring actuated sliding door opening devicecarried by the bar and provided with means to engage the arm to ithrlcgwthe door open upon the fusion of the 7. In combination with a stove orfurnace and its check-draft door, a fusible lock for holding the doorclosed, a bar pivotally sup ported for movement toward and from the freeedge of the closed door, an engaging member on the door adapted toproject beyond the free edge thereof, a bracket slidably mounted on thebar, a door opening device slidably mounted on the bracket and having afinger engaging said engaging member, and a spring connecting said dooropen- 7

